The great tragedy of the exchange is that Rotolight turned what could have become a customer service success story into a PR disaster. The rank incompetence of how Rotolight handled this incident is breathtaking. A competitor engaging in industrial sabotage would have been hard pressed to do a better job of destroying their reputation than Rotolight has done themselves.
The key issue is that the flaw being discussed in the negative review was one that Rotolight CLAIMS to have corrected in future versions of the product. They cared enough about the negative review to commit perjury to silence it. Why didn't they care enough to, for example, exchange the older, flawed product for an upgraded one, so the reviewer could repeat the test with the new kit? They could have used the negative review, even engaged with the reviewer, to turn this into a marketing opportunity to highlight advances in their hardware.
Unless, of course, the claim that newer versions of the hardware lack this flaw is another lie. They showed they're willing to lie on a legal document, a DMCA complaint, to commit perjury. Why should their marketing claims be trusted about the flaws allegedly corrected in their products? We know they used legal thuggery to censor one bad review. How many other bad reviews were scuttled by the abuse of the legal system? For all we know half the people who've used the products could consider them utter shite, and we don't know about it because of an active, and abusive, legal strategy by censorship happy scumbags.
This also brings into doubt the positive reviews that can be found online. A company that lies to silence their critics is, in general, not going to be above lying to make their products look better than they really are.
Unless you already have personal experience with Rotolight and like their products, it would be wise to avoid them in the future. There's no way of knowing how good their products really are. Just don't talk about what you think of their hardware. Thanks to Rotolight, your sincerity and objectivity will be in question if you say anything nice about their products.